Islands of Ireland: Inis Mór than meets the eye

This image shows a view of the cliffs of Inis Mor (Aran Islands) and the Atlantic Ocean from within the walls of Dun Aengus

WHERE to start with this awesome wedge of rock in the Atlantic? At the beginning? But where is the beginning? Inis Mór is a continuation of the Burren, whose limestone beds were laid down in the Carboniferous era 350 million years ago.